<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
<style>
  html {
    box-sizing: border-box;
    display: grid;
    place-items: center;
    height: 100%;
    border: 20px solid green;
  }
</style>
This page should have a green border.
